Now that I also applied this on a ppc64 machine: is __ppc64__ really
available on your machine? I only have __PPC64__ or __powerpc64__
defined. However, once I put __powerpc64__ into the list and thus
activate the test on ppc64 I get this error:

This time it's a regression in the CPU frequency. So probably you don't
want to mention anything about PPC64 there since the format that
linuxNodeInfoCPUPopulate() parses is still from the procfs and
arch-dependent *OR* you add a ppc64-specific proc file that you only
read on a ppc64 host. The latter may be better since it doesn't skip the
test then.